Preparation of aluminum hydroxide and oxide nanostructures with controllable morphology by wet oxidation of AlN/Al nanoparticles

• Published in: Materials research bulletin Vol. 104; pp. 97 - 103
• Main Authors: Kazantsev, S.O., Lozhkomoev, A.S., Glazkova, E.A., Gotman, I., Gutmanas, E.Y., Lerner, M.I., Psakhie, S.G.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 01.08.2018
• Subjects: ADSORPTION; AlN/Al nanoparticles; Alumina; ALUMINIUM HYDROXIDES; ALUMINIUM NITRIDES; ALUMINIUM OXIDES; Aluminum hydroxide; Calcination; CONTROLLED ATMOSPHERES; DESORPTION; MORPHOLOGY; NANOPARTICLES; NANOSCIENCE AND NANOTECHNOLOGY; NANOSTRUCTURES; NITROGEN; OXIDATION; SCANNING ELECTRON MICROSCOPY; SPECIFIC SURFACE AREA; THERMAL GRAVIMETRIC ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; Wet oxidation; WIRES; X-RAY DIFFRACTION; Wet oxidation; Morphology; Aluminum hydroxide; AlN/Al nanoparticles; Calcination; Specific surface area; Alumina
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2018.04.011

[Display omitted] •Aluminum hydroxide nanoparticles were synthesized by wet oxidation methods.•The oxidation conditions of AlN/Al affect the morphologies of the reaction products.•No changes in the synthesized materials morphology occurred up to 1000 °C.•The maxima specific surface areas for the nanostructures were achieved at 500 °C. A simple and environmentally friendly method to prepare aluminum oxyhydroxide and trihydroxide nanostructures by wet oxidation of AlN/Al composite nanoparticles was developed. The AlN/Al nanoparticles used were produced by electrical explosion of an aluminum wire in nitrogen atmosphere. The obtained nanostructures were characterized employing X-ray diffraction (XRD), transmission and high-resolution scanning electron microscopy (TEM and HRSEM), thermogravimetric analysis (TGA) and N2 adsorption-desorption technique (BET). By changing the wet oxidation conditions, aluminum hydroxides with different phase composition, morphology and texture characteristics were synthesized. After calcination at different temperatures, a range of transition and stable alumina nanostructures were obtained that preserved the morphology of the aluminum hydroxide precursors - agglomerated nanosheets, nanoplates or hexagonal nanorods, up to 1000 °C. Optimal process parameters for maximum surface area development for all the precursor materials have been established.